Super Xuxa Against the Down Mood (1988)

Baixo Astral, an evil spirit who lives in the sewers, and whose mission is to bring unhappiness to the world, sees Xuxa on TV asking children to fight for a better world. Threatened by those words, he declares war on her and devises a plan: helped by his allies Titica and Morcegão, he kidnaps Xuxo, her dog. Helped by Xixa (a gypsy caterpillar) and Rafa, a rebel teenager, Xuxa goes on a mission to get her dog back and save the world from Baixo Astral.